/* Animaciones scroll */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.fade-in.visible { opacity: 1; transform: none; }

/* Pulso WhatsApp */
@keyframes pulse-wa {
  0%   { transform: scale(1); box-shadow: 0 0 0 0 rgba(37,211,102,.6); }
  70%  { transform: scale(1.05); box-shadow: 0 0 0 12px rgba(37,211,102,0); }
  100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(37,211,102,0); }
}
.wa-btn { animation: pulse-wa 2s infinite; }

/* FAQ */
.faq-content { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-content.open { max-height: 600px; }

/* Menú móvil */
#mobile-menu { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
#mobile-menu.open { max-height: 400px; }

/* Calc pasos */
.calc-step { display: none; }
.calc-step.active { display: block; }

/* Galería placeholder */
.gallery-ph {
  aspect-ratio: 4/3;
  background: linear-gradient(135deg,#1a3a5c,#0F2A47);
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,.25); font-size: 2.5rem;
}

/* Marcas */
.brand { filter: grayscale(1); opacity:.55; transition: all .3s; }
.brand:hover { filter: grayscale(0); opacity:1; }

/* Barra sticky móvil oculta en ≥768 */
@media (min-width:768px) { #sticky-bottom { display:none !important; } }

/* Scroll suave global */
html { scroll-behavior: smooth; }